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No heat in Taurus - not thermostat or heater core


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Anonymous Poster

Oct 19, 2008, 12:46 PM

Post #1 of 8 (3609 views)
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No heat in Taurus - not thermostat or heater core Sign In

Hi! I have a 2002 Ford Taurus SES 86000 mi engine size: 2.0

I have not had heat for over a year. Thermostat has been replaced, vents are working, AC is working, blows good air out of all vents - only blows cold air, Felt heater hoses - very hot, so I don't think it's the heater core. We replaced anti-freeze. Does anyone think it could be a blend door? If so, is this hard to replace by myself and how do I do it? Thank you so much for any thoughts!!


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 19, 2008, 1:13 PM

Post #2 of 8 (3603 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

It would be rare (to me) but yes there's a blend door that controls air thru core for level of heat. I don't have diagrams but you may see this looking under dash, thru glove box where an actuator actually turns the door. You may be able to turn it by hand and start figuring on if the motor is bad, control request is wrong or door isn't able to move from there.

Do you hear something trying or any clues from control head?

T
_________________________________________
Long retired now


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Anonymous Poster

Oct 19, 2008, 1:22 PM

Post #3 of 8 (3600 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

Thanks for your reply! No, I don't hear anything at all - seems like everything is operating fine. Do you think I should be focusing on the blend door or the white box motor or do you think my problem could be related to something totally different from the blend door from the information I have told you? Thanks again!!


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 19, 2008, 1:37 PM

Post #4 of 8 (3596 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

You said it's been over a year with this so I dismissed the more common problem of being low on coolant. That still needs to be known full, in the system not just at the reservoir.

Some set ups control the amount of hot coolant flow with a "heater control" valve in line of input heater hose and I didn't see one listed for this car so that leans towards the blend door as you thought.

Be nice if you could find the actuator easily to see if it moves, is disconnected or what but some are burried deep. It could be the control head just isn't telling it to do anything but blow cold so that's in the cards too.

With heater hoses hot on both sides it suggests core isn't totally plugged and if that's all it was it would have one cold hose while operating heater.

Before this leads to "open dash" surgery it would be nice to nail it down. I'd be digging in to look for the actuator and just see it as they can strip and not move the door. Door itself can break too but hard to believe you wouldn't be complaining about A/C not right or other problems with air flow controls too.

Had anything been done that could have bumped or left something disconnected - a radio fixed or replaced - anything for clues?

I'll wait for your observations again and look to see what I can find on the actuator motor itself for this as they can just quit and no doubt the "home" position is for no heated air if broken,

T
_________________________________________
Long retired now


Guest
Anonymous Poster

Oct 19, 2008, 1:53 PM

Post #5 of 8 (3593 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

Thx again for your time Tom! The only thing I can pinpoint is I had a mechanic replace the cabin air filter and it seems like this is when the no heat problem started. Do you know if it is major surgery to fix the actuator by myself? Is it difficult to find?


Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 19, 2008, 4:09 PM

Post #6 of 8 (3585 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

BINGO! Get right back to that area and see what happened. If that can be installed such that a duct right near it can't move or a wire or anything strange then that explains it,

T
_________________________________________
Long retired now


vieta
Anonymous Poster
vieta66@yahoo.com

Dec 4, 2008, 1:01 PM

Post #7 of 8 (3420 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

Mr. Greemleaf, not sure if the person problem was solved but am looking at the same problem and was woundering did the solution you gave him work??


Tom Greenleaf
Ultimate Carjunky / Moderator
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Dec 4, 2008, 5:08 PM

Post #8 of 8 (3415 views)
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Re: No heat in Taurus - not thermostat or heater core [In reply to] Sign In

I dunno?? If folks don't come back with the results it remains a mystery. In that they aren't back it must have been found with changing cabin air filter and something was out of place??

T
_________________________________________
Long retired now




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